Bufferedreader readLine()接受无限输入......为什么?

时间:2014-09-13 20:19:25

标签: java bufferedreader readline

为什么我的bufferedreader readLine()方法需要无限输入 如何解决这个问题...如果有人在程序中发现任何错误.....欢迎回复

import java.io.*;
import java.util.*;


public class average {

    public static void main(String[] args){

      int j,sum=0,count=0;

      String[] input=null;
      System.out.println("Enter the number of test cases");
      Scanner in=new Scanner(System.in);
      int t=Integer.parseInt(in.nextLine());

      System.out.println(t);

       System.out.println("Enter the number of contestent and there score");
       BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
       try {
         String line = stdin.readLine();
         System.out.print('\n');

         while (line != null && line.length()!= 0 ) 
             input = line.split(" ");
           } catch (IOException e) {
              System.out.println("Something wrong happend try again"+e);
           }


        for(int i=1;i<=input.length;i++)
               sum+=Integer.parseInt(input[i]);
               System.out.println(sum);   
           int avg=sum/(Integer.parseInt(input[0]));    

        for (int i=1;i<=input.length;i++)
       {
       if(Integer.parseInt(input[i])==avg)
           count++;
      } 
    System.out.println("The number of contestent who got average marks is"+count );
    }
    }

2 个答案:

答案 0 :(得分:3)

while (line != null && line.length()!= 0 ) 
     input = line.split(" ");

这是一个无限循环。如果line不为空且不为空,则循环内的任何内容都不会改变,因此它将无限循环。

答案 1 :(得分:2)

你的循环错了。你应该在每次迭代时调用readLine(),如果你真的想从流中读出所有数据:

 while( null != ( line = stdin.readLine() ) && line.length() != 0 ) 
   input = line.split(" ");
 }